Improvement in planing-machtnes



UNITED STATES PATENT OEEIOE.

JOEN E. sonENox, OE MATTEAWAN, NEw Yonx.

IMPROVEMENT IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 86,461, dated February 2, 1869.

To all whom it may concern.- Y

Be it known that I, JOHN B. SCHENGK, of Matteawan, in the county of Dutchess and State of New York, have invented a new and useful Improvement in Woodworth Planing- Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being the upper feed-rolls are adjusted upon either side of the cutterssimnltaneously also, in the combination of parts whereby the facing-cutter and pressure-bars are adjusted in an oblique direction, and the top feed-rolls in a perpendicular direction simultaneously; also, in the combination of the box of the inner adjustable feed-roll and the saddle connecting it tothe presser-bar with said bar,for the purpose of preserving the relative positions and pressures of the feed-roll and pressure-bar during their simultaneous movements; also, in the means employed to arrest the upward movement of the pressurebar to prevent its being thrown in contact with the facing-cutter; also, in the combination ot' the weighted levers, the stirrups, and saddles with the top feed-roll and the pressure-bars, for the purpose of giving to each part a due proportion of pressure, so that increasing or diminishing the pressure by shifting the position of the weight on the lever will not affect the proportionate distribution of the weight or pressure on the parts; and it consists, lastly, in the ,combination of the shorter saddle with its pressurebar and feedroll, for the purpose of varying the amount of pressure upon the pressure-bar in accordance with the thickness of the lumber to be operated upon as the bar and roll approach or recede from each other in their movements.

In the accompanying plate of drawings, Figure 1 represents a vertical longitudinal section through the line w of Fig. 2. Fig. 2 is a sectional top view. Fig. 3 is a detailed view of one of the graduating-screws. Fig. 4 is a detailed View, showing the method of raising the saddles, which are connected with one of the feed-rollers and receiving pressure-bar.

Similar letters of reference indicate corresponding parts.

A represents the part which carries the top feed-rolls, and is supported by the screw B, by which it is raised and lowered, according' to the thickness of the lumber to be dressed, and is kept in position and guided by the guides C, D, and E, by which arrangement a simultaneous and accurate adjustment is et'- fected. F F' are the upper receiving feedrollers, and Gr the upper delivery feed-roller.

The arrangement for weighting embraced in my improvement distributes the pressure, as required, on the end of the feed-rolls, and on the two pressure-bars H and I, using only one dead-weight, J, and lever K, as follows:

L is a stirrup, which is suspended from the saddle m, one end of which saddle rests on the box of the feed roll F. rlhe other end rests on the short saddle n. One lend of the short saddle 'n rests on the box of the feed-roll F, and vthe other end passes loosely through the pressure-bar H. The point where the saddle m rests on the saddle a is near the box of the feed-roll F, so as to give the proper proportion of pressure to the roll and to the pressure bar, respectively.

B is a long saddle-bar, one end of which rests on a projection near the lower end of the stirrup L. The other end rests on a projection on the lower end of the stirrup O. The upper end of this stirrup O rests on the saddle P. One end of the saddle P rests on the box ot' the roll G, while the other end rests on the pressure-bar I, and the point wh ere the stirrup O rests on the saddle P is near the roll Gr, so as to give each (the roll and pressure-bar) the proper proportion of pressure.

The saddle B (at a point about one-third of its length from the stirrup L) is connected with the weighted lever K, by which the pressure is produced which gives the receiving or introducing rolls and the deliveryfrolls their proportionate pressure.

The box of the roll F is provided with a projection or horn, q, which raises (as it is raised itself) the short saddle oz, the end of which saddle raises at the same time the pressure-bar H.

This arran gementkeeps the pressure-bar and the roll in the same relative position (after the roll is raised by the lumber) that they occupied before, so that the lumber raises the pressure-bar only so much as the bottom of it is set below the bottom of the roll, say oneeighth of an inch.

The ends of the saddles a and P project through slots in the pressure-bars, and into slots formed in the facing-cutter carrier near its top. These latter slots form stops, against which the ends of the saddles strike, (should the1 be raised so high by the thickness of the lumber, or from any other cause,) and prevent thereby the pressure-bars from being raised into contact with the cutter-knives.

The slide B, which supports one end of the facing-cutter and both pressure-bars, is graduated on oblique slides, placed at such an angle as to -require the same length of facing-cutter belts in all positions required by the different thicknesses of lumber. This Islide is'graduated simultaneously with the upper feed-rolls, it being connected to the part-.A by the bar S.

The object of this simultaneous adjustment is saving of time, accuracy. of adjustment, and preserving therelative positions of the parts under all circumstances.

The feed-rolls are graduated on perpendicular slides, and the cutter and presssure--bars on oblique slides, which incline toward the-introducing feed-rolls, and when vthe parts are raised or lowered, to admit thicker or `thinner lumber, the introducing pressure-bar H is brought nearerto or farther from the pointon the saddle a atwhich it lreceives' the saddle m, the saddle n slipping between the projection onthel pressure-bar H. 'This increases the pressure received by the pressure-bar H when thicker lumberisto be dressed,'and decreases the pressure when thinner lumber .is'fto -be dressed, the importance of .which-is obvious.

I claim as new and desire tosecure by Letters Patent- 1. Thecembinationof the part-A and adjusting-screws B with the feed-rolls G, F, and F', wherebythe feed-rolls are adjusted or graduated` upon each side of the cutters simultaneously, as described, for the purpose specified.

2. The combination of the part A and screw B with the bar S, the oblique cutter-carrier slide R, and the pressure-bars H I, whereby the facing-cutter and pressure-bars are ad-- acarrier with :the-.slotted -pressurebar H and `v`:saddlefm-.whereby the upward movement of .thepressure-baris. arrested, to prevent its be- `ing .carried in contactwith vthe facing-cutter, asf hereinwshown andl described.

5. The combination of -thef weighted levers K, the saddle-bar B', stirrups L O, and sad- 1- ydles ma P :with the top feed-rolls and the pressure-bars, whereby each part is given a due proportion of pressure, so that increasing or diminishing the pressure, by .shifting the position of `theweight on the lever,will not aifect'the-proportionate distribution of the v.weight or pressure on .the parts, as herein shown: `and described.

16.: The combination of the saddle n with the obliquely-adjustable pressure-bar. H and the perpendicular,y yadj ustable feed-roll F, whereby, ,N

4as the bar H and roll F approach or recede ;from .eachother inL their movements, the amount of pressure. upon the pressure-bars is raised,` according tothe thickness of the lumlber to beoperated upon, as herein shown and -described.

JOHN B. SGHENCK. 1 Witnesses J. A. Woon, E. S. PHILLIPS. 

